Third video: It was obvious that they are building an experimental craft. I wonder about the costs and time required to build additional crafts as ordered from Virgin Galactic and potentially other customers.

I would say they at least have some room for "serial production procedures", to minimize needed time and costs *in case* they are capable of implementing these procedures as they have been all the time the "X-Craft Company".

Euhm, they intend to built, what?, 7 or 8 ships for Virgin and 0 for anyone else? Serial production doesn't come into play with those numbers. Besides, Scaled isn't a factory like the average autombile factory around the world. It simply isn't needed. And the investment for real serial production is extremely high.

I mean, look at that third video. There is absolutely nothing they can produce in series. A ferrar production line is more serialized. (with an s or z??)

I would say they at least have some room for "serial production procedures", to minimize needed time and costs

The construction methods do not look much different than those used for normal aircraft to me. Aircraft are not produced on automated assembly lines like cars are, partly because the sales volume is too small and partly because they are too big to build that way (or at least airliners are too big). That is one of the reasons aircraft, even small reciprocating engine airplanes flown by private pilots, cost so much more than cars.